CVE-2021-30187

What it is

CODESYS V2 runtime system SP before 2.4.7.55 has Improper Neutralization of Special Elements used in an OS Command.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. Limited direct impact.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-05-25 12:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 03:49 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.3% in the next 30 days (EPSS).
• Severity: 5.3 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-05-25 12:15 UTC

Last modified

2026-06-17 03:49 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-78 · OS command injection

Record status

Analyzed

Affected

• Wago 750-893 Firmware < fw08
• Wago 750-891 Firmware < fw08
• Wago 750-890 Firmware < fw08
• Wago 750-889 Firmware < fw15
• Wago 750-885 Firmware < fw15
• Wago 750-882 Firmware < fw15
• Wago 750-881 Firmware < fw15
• Wago 750-880 Firmware < fw16

Attack profile CVSS 3.1 · 5.3

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-30187.md and follow it. Check whether this project is affected by CVE-2021-30187. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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